Economic downturn in one nation, could drag the global economy down into recession. As occurred during the 2008 economic crisis. When economic slowdown associated with US banking issues toppled the world economy.

Nations are networks of trading partners. When one goes down. It can have a chain reaction, where others are taken down with it.

If sacrifice is the smart call to make. I think people might question why the EU hasn't already sacrificed greece. To encourage them to resolve their debt crisis.

That could happen eventually if deficits rise to a point where they become unsustainable. Nations with high deficits and debt could be cut (sacrificed?) to maintain overall liquidity. That could be an interesting discussion/debate topic.